What was found
AT FLT LVL 240 WITH ENGINE AND WING ANTI-ICE ON LEFT ENG BLEED LIGHT ILLUMINATED. FOLLOWED QRH SHUT BLEED SW OFF. OPENED ISOLATION VLV AT FLT LVL 260 RIGHT ENGINE BLEED LIGHT ILLUM. CABIN PRESSURE CLIMBED THROUGH 10K DEPLOYED MASKS. DECLARED EMERGENCY INTO ORF. MTC FOUND SEAT ROWS 26 AND 27 DEF MASKS DID NOT DEPLOY. ALSO FOUND AFT RT LAV MASK DID NOT DEPLOY. MX HAS FOUND A DUCT IN THE UNDERWING SECTION CRACKED.